Active Ventilation 3 in. Dia Aura PVC Vent Cap Exhaust with Adapter for Schedule 40 or Schedule 80 PVC Pipe in Black AV-3-PVC-BL - The Home Depot
Vent Pipe Caps - Vent Pipe Cover - Amazon.com
Master Flow 4 in. Vent Cap VC4 - The Home Depot
Active Ventilation 10 in. Dia Aura PVC Vent Cap Exhaust with Adapter for Schedule 40 or Schedule 80 PVC Pipe in Mill Finish AV-10-PVC - The Home Depot
Active Ventilation 8 in. Dia. Aluminum Vent Pipe Cap in Mill Finish VPC-8 - The Home Depot
Toma RV Vent Covers for Roof Mushroom Head Shape Ventilation Caps Top Mounted Wind Ventilating Exhaust Cooling Parts and Accessories white - Walmart.com
Imperial 6 In. Black Aluminum R-2 Premium Roof Vent Cap with Collar - Thomas Do-it Center